Tongue

Question 1

what forms the posterior 1/3rd of the tongue ?

Answer 1

the base of the tongue ( which is connected to the epiglottis

Question 2

what is the V shaped depression on that divides the tongue into anterior and posterior parts called ?

Answer 2

terminalis sulcus

Question 3

oral part of the tongue = anterior 2/3rd

pharyngeal part of the tongue = posterior 1/3rd

Answer 3

–

Question 4

The sulcus is directed from a central depression called ___

Answer 4

foramen caecum

Question 5

what are the different types of papillae present on the tongue ?

Answer 5

1. ) vallate papillae : 8-12 in number . can be found infant of the sulcus terminals , contains taste buds
2. ) fungiform pailliae :rounded reddish elevations found on the apex and sides of the tongues , contains taste buds
3. )filiform papillae: numerous in number , found in the center of the tongue , do not contain tats buds
4. )Foliate pappilae: 3 or 4 vertical folds that may or may not be present , contains taste buds

Question 6

what is present on the inferior surface of the tongue ?

Answer 6

deep lingual vein
frenulum
plica fimbriata

Question 7

what are the 2 types of muscles present in the tongue ?

Answer 7

extrinsic muscles : muscles that alter the position of the tongue

intrinsic muscles : muscles that alter the shape of the tongue

Question 8

what are the extrinsic muscles and what are their functions ?

Answer 8

genioglossus : protrudes tongue

hyoglossus :
depresses tongue

styloglossus : retracts tongue

palatoglossus : elevates tongue

Question 9

what are the intrinsic muscles found in the tongue ?

Answer 9

• superior longitudinal
• inferior longitudinal
• transverse fibers
• vertical fibers

Question 10

what is the motor nerve supply of the tongue ?

Answer 10

all muscles are supplies by hypoglussal nerve (12th cranial nerve )except for palatoglossus which is supplies by the accessory nerve (11th cranial nerve )

Question 11

describe the sensory nerve supply of the tongue .

Answer 11

anterior 2/3rd :
general sensation : lingual nerve

specific sensation ( taste ) : chordates tympani

posterior 1/3rd: glossopharyngeal

Question 12

why structures are responsible for blood supply of the tongue ?

Answer 12

arteries :
-lingual artery

• tonsillar branch of facial artery
• ascending pharyngeal artery

veins :lingual vein , ultimately drains into internal jugular vein